8-10 June 2016
Asia/Bangkok timezone

Analysis of Io’s magnetic footprint features using VIPAL magnetic field model

Jun 8, 2016, 3:15 PM
15m
Room J1

Room J1

Oral presentaion Astronomy, Astrophysics and Cosmology Session VII

Speaker

chaiyaporn sukollapun

Description

Jupiter is the most gigantic planet in the solar system and yet, generating the most intense and enormous magnetosphere. VIPAL magnetic field model is chosen to simulate Jupiter’s magnetic field model. VIPAL was constructed based on observations by Pioneer and Voyager spacecrafts. This model appears to have a lot of benefits. For example, it can be used to analyze auroral emission in Jupiter’s ionosphere. This model also has the best prediction of contact positions between ionosphere and magnetic field lines that cross Io, called Io’s footprint. VIPAL also gives better magnetic field strength prediction than previous models. In order to predict footprint positions in both north and south hemispheres, we traced along the magnetic field lines beginning from Io orbital position to the footprint locations in ionosphere. There are many factors to be considered, for example, the shape of Jupiter, Io’s orbit inclination and eccentricity, to get the best prediction of footprint position as possible. These positions are expected to have the emission of auroral features. One of the most important of this features are their brightness. Previous studies found that this brightness has a strong relation with Io longitude and relates to the latitude of Io in the torus. Therefore, in order to make better physical interpretation, the relation between Io footprint brightness and magnetic field strength is presented in this work.
Keyword: Jupiter, VIPAL, Io, footprint, auroral

Primary author

Co-author

Suwicha Wannawichian (Department of Physics and Materials Science, Chiang Mai University)

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